CrawlJobs Logo

Filters

Location
Salary
Clear all filters

Developer United Kingdom, Belfast Jobs

22 Job Offers

Senior Java Developer (Smart Order Routing (SOR)) - Equities Electronic Trading
Save Icon
Senior Java Developer sought for VP-level role in Equities Electronic Trading in Belfast. You will design and optimize a core low-latency Smart Order Router (SOR) using high-performance Java and microservices. Requires expert JVM internals, concurrency, and FIX protocol knowledge. Benefits includ...
Location Icon
Location
United Kingdom , Belfast
Salary Icon
Salary
Not provided
https://www.citi.com/ Logo
Citi
Expiration Date
Until further notice
Salesforce Developer
Save Icon
We are seeking a skilled Salesforce Developer for a major public sector client. This role requires expertise in Apex, Lightning, Visualforce, Pardot, and CPQ. Initially, you will work 1 day per week in Belfast, transitioning to fully remote work. Candidates must be eligible for SC Clearance.
Location Icon
Location
United Kingdom , Belfast
Salary Icon
Salary
Not provided
morson.com Logo
Morson Talent
Expiration Date
Until further notice
Java Developer
Save Icon
Join Citi’s Tech team in Belfast as a Java Developer to engineer the future of global finance. You’ll build scalable microservices using Java 11+, Spring Boot, and Kafka, while leveraging AI tools like GitHub Copilot. Enjoy hybrid work, 27 days leave, private medical care, and a performance bonus...
Location Icon
Location
United Kingdom , Belfast
Salary Icon
Salary
Not provided
https://www.citi.com/ Logo
Citi
Expiration Date
Until further notice
Senior Java Developer (AVP)
Save Icon
Senior Java Developer (AVP) at Citi in Belfast. Join a global team redefining finance, building high-scale systems that process $5 trillion daily. You will develop robust applications using Core Java, Spring Boot, and Microservices, with hands-on AI tool experience. Enjoy 27 days leave, bonus, pr...
Location Icon
Location
United Kingdom , Belfast
Salary Icon
Salary
Not provided
https://www.citi.com/ Logo
Citi
Expiration Date
Until further notice
Ui Developer (.Net/React)
Save Icon
Senior UI Developer (.NET/React) sought for Citi’s Belfast team to transform legacy UI into modern React/HTML5 components. Requires expertise in .NET/C#, React, HTML5, CSS3, JavaScript, and test frameworks. Enjoy 27 days annual leave, private medical care, performance bonus, and pension plan. Dri...
Location Icon
Location
United Kingdom , Belfast
Salary Icon
Salary
Not provided
https://www.citi.com/ Logo
Citi
Expiration Date
Until further notice
Lead Java Developer
Save Icon
Lead Java Developer sought by Citi in Belfast to define architecture and build scalable, high-performance applications. You will leverage Java, RESTful services, and AI-powered tools while mentoring junior team members. This role demands expertise in clean coding, SOLID principles, and code quali...
Location Icon
Location
United Kingdom , Belfast
Salary Icon
Salary
Not provided
https://www.citi.com/ Logo
Citi
Expiration Date
Until further notice
Salesforce Software Developer
Save Icon
Seeking a Senior Salesforce Software Developer in Belfast to design and maintain scalable solutions using Apex, LWC, and Visualforce. Requires 5+ years of experience, Agile/Jira proficiency, and eligibility for UK SC clearance. Ideal for client-facing experts with a coaching mindset and Salesforc...
Location Icon
Location
United Kingdom , Belfast
Salary Icon
Salary
Not provided
whitehallresources.com Logo
Whitehall Resources Ltd
Expiration Date
Until further notice
Technology Developer
Save Icon
Location Icon
Location
United Kingdom , Belfast
Salary Icon
Salary
Not provided
https://www.citi.com/ Logo
Citi
Expiration Date
Until further notice
Java/Kotlin Software Engineer – AVP - (Developer Enablement)
Save Icon
Location Icon
Location
United Kingdom , Belfast
Salary Icon
Salary
Not provided
https://www.citi.com/ Logo
Citi
Expiration Date
Until further notice
Business Developer AFH
Save Icon
Join us as a Business Developer AFH in Belfast, driving growth with iconic brands. You’ll manage a territory, build lasting customer relationships, and leverage digital tools to deliver results. We seek ambitious achievers with a clean driver’s license. Enjoy a company car, bonus incentives, coac...
Location Icon
Location
United Kingdom , Belfast
Salary Icon
Salary
Not provided
coca-colahellenic.com Logo
Coca-Cola HBC
Expiration Date
Until further notice
Python Developer
Save Icon
Citi seeks a skilled **Python Developer** to join its Wholesale Credit Risk Technology team in **Belfast, UK**. You will design innovative solutions using **Python, FastAPI, and Kubernetes**, with experience in **LLMs, RAG, and MCP**. This intermediate role involves collaborating with onshore/off...
Location Icon
Location
United Kingdom , Belfast
Salary Icon
Salary
Not provided
https://www.citi.com/ Logo
Citi
Expiration Date
Until further notice
Senior Java Developer
Save Icon
Senior Java Developer sought by Citi Belfast to design and deploy microservices and RESTful APIs using Spring Boot. Requires 5+ years of core Java expertise, multi-threading, and Spring Framework proficiency. Join a global banking leader offering hybrid work, 27 days leave, private medical care, ...
Location Icon
Location
United Kingdom , Belfast
Salary Icon
Salary
Not provided
https://www.citi.com/ Logo
Citi
Expiration Date
Until further notice
Senior Python Developer
Save Icon
Senior Python Developer needed in Belfast for Citi’s Wholesale Credit Risk Technology team. You will design innovative solutions using Python, FastAPI, and modern AI frameworks like LLMs and RAG. Requires 5+ years of enterprise development experience with CI/CD, Kubernetes, and strong collaborati...
Location Icon
Location
United Kingdom , Belfast
Salary Icon
Salary
Not provided
https://www.citi.com/ Logo
Citi
Expiration Date
Until further notice
Ab-Initio ETL Developer
Save Icon
Join our Technology team in Belfast as an Ab-Initio ETL Developer. You will design and build scalable data pipelines for the critical Strategic Ledger program, transforming data for Oracle Financials SaaS. This role requires deep expertise in the Ab Initio platform (GDE, Co>Op, EME), SQL, and Uni...
Location Icon
Location
United Kingdom , Belfast
Salary Icon
Salary
Not provided
https://www.citi.com/ Logo
Citi
Expiration Date
Until further notice
Business Developer Convenience
Save Icon
Join our Sales team in Belfast as a Business Developer for Convenience. You will manage a territory, build strong partner relationships, and drive growth for iconic brands. Utilize digital tools to analyze markets and negotiate contracts. Enjoy a company car, bonus incentives, and development opp...
Location Icon
Location
United Kingdom , Belfast
Salary Icon
Salary
Not provided
coca-colahellenic.com Logo
Coca-Cola HBC
Expiration Date
Until further notice
Lead Frontend Developer (ReactJS)
Save Icon
Lead Frontend Developer role in Belfast, using ReactJS to build global finance systems at Citi. Provide technical leadership, enforce best practices, and mentor a team. Requires 3+ years of lead React experience and offers strong benefits including bonus, private healthcare, and hybrid work.
Location Icon
Location
United Kingdom , Belfast
Salary Icon
Salary
Not provided
https://www.citi.com/ Logo
Citi
Expiration Date
Until further notice
Lead Frontend Developer (ReactJS), Assistant Vice President
Save Icon
Lead Frontend Developer (ReactJS) role in Belfast. Spearhead UI development, define architecture, and mentor a team. Requires 3+ years of React leadership and expertise in modern JavaScript. Build cutting-edge, performant web applications.
Location Icon
Location
United Kingdom , Belfast
Salary Icon
Salary
Not provided
https://www.citi.com/ Logo
Citi
Expiration Date
Until further notice
Full Stack Lead Developer
Save Icon
Lead the development of robust, scalable applications as a Full Stack Lead Developer in Belfast. This role requires deep expertise in Java, Spring Boot, ReactJS, and both RDBMS & NoSQL databases. You will drive CI/CD best practices and have the opportunity to explore AI integration. Mentor a dyna...
Location Icon
Location
United Kingdom , Belfast
Salary Icon
Salary
Not provided
https://www.citi.com/ Logo
Citi
Expiration Date
Until further notice
Productivity and Tooling Java Developer
Save Icon
Location Icon
Location
United Kingdom , Belfast
Salary Icon
Salary
Not provided
https://www.citi.com/ Logo
Citi
Expiration Date
Until further notice
Senior AI Frontend Engineer (Developer Productivity)
Save Icon
Join Citi in Belfast as a Senior AI Frontend Engineer. Leverage your deep React/TypeScript expertise to build the UI for a next-gen AI Developer Productivity platform. You'll transform cutting-edge Generative AI into intuitive experiences for 50,000+ global engineers. Enjoy top benefits including...
Location Icon
Location
United Kingdom , Belfast
Salary Icon
Salary
Not provided
https://www.citi.com/ Logo
Citi
Expiration Date
Until further notice
Previous 1 2 Next

About the Developer role

Discover the dynamic world of developer jobs, a cornerstone of the modern digital economy. Developers are the creative and technical masterminds behind the software, applications, and systems that power our daily lives. From the websites we browse to the mobile apps we use and the complex enterprise software running global businesses, developers are the architects of our digital future. This profession involves designing, coding, testing, and maintaining the software that drives innovation across every industry.

A developer's primary responsibility is the entire software development lifecycle. This begins with analyzing user needs and then designing robust software solutions to meet those requirements. The core of the role involves writing clean, efficient, and well-documented code in various programming languages. Developers build and maintain the backbone of applications, which includes creating and managing Application Programming Interfaces (APIs), backend services, and database structures. They are responsible for implementing key architectural patterns like microservices to ensure systems are scalable, reliable, and performant. A significant part of their work involves integrating different systems, such as connecting applications to databases, message queues, and third-party services.

Beyond initial creation, developers are tasked with continuous improvement and maintenance. This includes identifying and fixing bugs, optimizing applications for speed and stability, and implementing security best practices to protect against vulnerabilities. They conduct rigorous testing, including unit and integration tests, to ensure software quality. Furthermore, developers collaborate closely with other teams, such as frontend engineers, quality assurance (QA) specialists, and DevOps teams, to enable seamless continuous integration and deployment (CI/CD) pipelines. In many modern environments, developers also work on containerizing applications using tools like Docker and orchestrating them with platforms like Kubernetes. For senior and leadership roles, responsibilities expand to include mentoring junior team members, managing project timelines, making strategic technology decisions, and overseeing a team's output and professional development.

Typical skills and requirements for developer jobs are diverse. A strong foundation in computer science principles is essential. Proficiency in one or more programming languages (such as Go, Java, Python, JavaScript, or C#) is a fundamental requirement. Developers must understand software architecture, including concepts like RESTful APIs, microservices, and event-driven systems. Experience with databases (SQL and NoSQL), version control systems like Git, and operating systems is standard. As the field evolves, knowledge of cloud platforms (AWS, Azure, GCP), containerization, and infrastructure-as-code is increasingly valuable. Crucially, soft skills are just as important; problem-solving abilities, analytical thinking, clear communication, and the capacity to work collaboratively in a team are highly sought after. Most positions require a bachelor's degree in computer science or a related field, or equivalent practical experience. Whether you are an entry-level programmer or an experienced applications development manager, developer jobs offer a challenging and rewarding career path for those passionate about building the technology of tomorrow.